Just a cheapo off ebay but has worked fine for last 2 years. A few nights back it stopped working, on investigation I noticed the PIR had some water in it, apart from the perspex window the only other place water could have entered was from the bottom panel that is screwed on, but that would defy gravity.
- Is it possible that the water was a build up of condensation, the PIR is located above the flood.
- I drained the PIR and left open for a couple of days to dry it out and is now working again.
- Would the PIR benefit from a couple of `pin holes` drilled in the underside To aid drainage and prevent condensation.